ArticleNature communications2018
Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils.
Article in Nature communications, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 33 citations in OpenAlex.
- Palaeoecological deductions from osteohistology.Biology letters · 2023Review
- Osteohistological description of ostrich and emu long bones, with comments on markers of growth.Journal of anatomy · 2022Article
- Keratan sulfate as a marker for medullary bone in fossil vertebrates.Journal of anatomy · 2021Article
- Evolution and distribution of medullary bone: evidence from a new Early Cretaceous enantiornithine bird.National science review · 2020Article
- Identifying medullary bone in extinct avemetatarsalians: challenges, implications and perspectives.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020Article
- An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone.Nature communications · 2019Article
- Systemic distribution of medullary bone in the avian skeleton: ground truthing criteria for the identification of reproductive tissues in extinct Avemetatarsalia.BMC evolutionary biology · 2019Article
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6 authors at 6 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Medullary bone is an ephemeral type of bone tissue, today found only in sexually mature female birds, that provides a calcium reservoir for eggshell formation. The presence of medullary bone-like tissues in extant birds, pterosaurs, and dinosaurs distantly related to birds shows that caution must be exercised before concluding that fossils bear medullary bone. Here we describe a new specimen of pengornithid enantiornithine from the Lower Cretaceous Jiufotang Formation. Consisting of an isolated left hindlimb, the three-dimensional preservation contrasts with the crushed preservation characteristic of most Jehol specimens. Histological examinations suggest this resulted from the presence of a thick layer of highly vascular bone spanning the medullary cavities of the femur and tibiotarsus, consistent with expectations for medullary bone in extant birds. Micro-computed tomographic scans reveal small amounts of the same tissue extending into the pedal phalanges. We consider the tissue to be homologous to the medullary bone of Neornithines.
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